Problem on COLD RESTART in Mervis



  • Hi, all .
    I made a simple sequent task in FBD just flag three bool variables b1, b2, b3 in a row.
    Duration of each task activated is 15sec.

    It worked fine except after Cold restart on mervis.
    On what happen is b2 and b3 activated on same time. It seems F_TRIG was activated even though I set each variables FALSE as initial value connected to F_TRIG. I appreciate if someone tell me why it happened and point me out the problem of my code.
    Sorry for pics, I could not figure out how to upload my project here.

    Thank you.

    ayone
    my_fbd.png
    ,main_program.png timer counts on same time.


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